OK, Thanks. I made one wrong spilling about : "--enable-tree-browser", missing ther last "r" ;) Then it passed. Kind Regards sunxun -----Original Message----- From: Ian Lance Taylor [mailto:iant@xxxxxxxxxx] Sent: Tuesday, September 05, 2006 11:25 PM To: MCG SUN Xun Cc: gcc-help@xxxxxxxxxxx Subject: Re: help: how to use tree-browse function in gcc4.1.1? "MCG SUN Xun" <Xun.SUN@xxxxxxxxxxxxxxxxxxxx> writes: > I download gcc4.1.1 and compiler it, debug it with gdb, then > according to http://gcc.gnu.org/projects/tree-ssa/tree-browser.html, > I want to use : > gdb> p browse_tree > but it shows: no this function. > Then I grep tree-browse.o under my gcc install directary, and no this > file there. > I try to find the configure and Makefile.in and no clue there. > I try to re-compiler gcc4.1.1 with: > ./configure --enable-tree-browse --enable-tree-checking > --prefix=MYDIR --enable-language=c > ./make > ./make install > But there is also no tree-browse.o generated. You need to configure with "--enable-checking=tree". The documentation is probably out of date. Ian